Type-writer-carriage-feeding mechanism.



` .LEXANDER. TYPE 'VRLTER QARRIAGE EEEDNG MEOHANISM.

P'LIGATIGN FILED OCT. 8, 1908."

2 mus-SHEET 1.4

m0 ms., @ai

y J. ALEXANDER. TYPE WRITER CARRIAGE FEEDING MEGHANISM,

APPLIOATIOH FILED 00T. S, 1908.A

2 SHEETS-SHEET 2.

of the tension device.

, or" drawings.

' ing the back-bar 6ptofthe'guideblock 7L pnrrnnsrnrns PATENT-f oir-Elon.

fnssn ALEXANDER.; on BROOKLYN, NEW YORK, Assenon', BY MEsNE ASSIGNMENTS',

`011 cnn-HALF 'no EMMA sonne sc HoncH'r, oF BUFFALO, `NEW YORK.

nYrn-vwnrrnm(innemen-Fnnnmo`r Mncnamsnr.

Specification of Gontinnation ci application SerialNo. 221,925, filed Uctolier 24, 1904.\ -"I.his application filed i Serial No. 456,805.

To all Iifwhom it may concern: i

Be it known that I, JESSE ALEXANDER, citizen of the United States, residing at Brooklyn, lcounty of Kings, State of New York, have invented certain new and useful Improvements in Type- Writer Carriage- Feeding Mechanism, of which the following is a full, clear, and exact description.

My inventionrelates tofimprovements in type-writers andv particularly to the carriage-feeding mechanism therefor.

This application is a continuation of ap plicants prior abandoned caseiSerial No. 221,925, iled :October 24,1904.

The object of this invention is to provide improved means for applying tension to the carriage ofv a machinev to move it from 'one side to the other'and at the same time provide escapement mechanism of such acharacter that the pressure upon the escapement- Wheel 'which normally has the f greatest amount of Wear shall be much less than the tension ony the carriage. This is effected by improvements the principles of which are illustrated in the accompanyingr two sheets' Figure 1 is a plan View of such partsof a machine as are necessary for the illustration of this invention, parts being broken away. Fig. 2 is a'detail rear View. Fig. 3 is a.' sidev elevation and section of parts Shown in Fig; 1 taken on the plane of the lines m-m'l Fig. 4 is a section and side elevation showingY the tension device and system of reducing gears. Fig. 5'. is across-section of the tension device. Fig. Gis a detail showing the pawl and part 1 indicates themain frame of the machine. i

2 is the back-plate affording a rearr support yfor the carriage.

43 is a-iront guide-track for the carriage construction. f-

4 and 5 are side-platesv of the carriage.

' 46 isa bar connecting the side-plates "at the",

rear. n v I 7 is a`guide-block adapted to slide in a suitablegguidein the4bacl -plate2j`- 8 is a thumbscrew for removably scourc indiansminigames]bythejgsid? y panying application No. 456,'80, filed Octof 'Patented Nov. 1, v1910.I .october 5,1908

Letters Patent.

Aand 5 near the front.

`11 is a roller carried 'by the bar 10 and guided in a slot in the front-track 3.-

12 indicates a platen-shaft. The general construction is more 1'0 is a .bar connecting theside-plates 4 's clearly `v shown, described and claimed in an accom*y ber 8th, 1908. s 1? is a block aifording a bearing for the tension shaft 14. i

15 isa drum which is pivotally mounted withrelation to the shaft..

16v is a spring having one end l'seoured'to the drum `'15 and the other end Securedto the shaft 14. v

f '17 is a ratchet connected `with s 'and preferably formed integral therewith.'

the drama -L 18 is a double-acting pawl which is pivot'- 1 ally carriedfby the fra-me of the machine and adapted tolco-act with the ratchet '17 to holdit in position as indicated in Fig. 6. 'f 'i The normal .tension of the spring will ro-l tate the shaft`14 clockwiseas viewed from the rear. I 19 is a second drum which is secured to the shaft 14 and rotates therewith. l 20 is the tension or pull-strap which is sof secured at one end to the drum 1 9 and at the otherA end to the projecting arm 21 carried `by the guide-block 7. Whenever the shaft 14 is free to rotate the carriage will be moved `to the left. Normally, however, the shaft 14 is restrained by the escapement mechanism" and the reducing gears.

22 is a typebar-plate aiording a hearingk I for the type-bar 23.

24 is the' universahbar mounted at the rear of the type-bar plate 22 and adapted to be operated by the type bars.

25 is the universal-shaft.

' 26 is a projection from the rear of the unii versal-bar 24 connected to the arm 27 which is carried by 'the universal-shaft 25.

v'shaft 25; A 1 c 29 is a "shaftjpivoted in the carriage side' plates 4y and 5 and carrying thestop-bariof 31 isan Vstop-bar vfrom itsoperative position'.`

acabara-n :position l 28 is a universaL arm carried. l :the: i

10o arm 'for manually 'releasing 'the .f

33 is a ratchet-wheel.,carried by the shaft 34. This ratchet, engages with the bevel edge of the stop-bar as shown particularly'in Figs. 2 and 3. This ratchet is connected by a tra-in of gears to the tension shaft 14. This train consists of a pinion 35, wheel 36, bevel gears 37 and 38, the'latter of which is mounted on the shaft 14.

From the foregoing, it will be seen that when. the parts are in the position shown in t-hedraWings, the tension of the spring 16 is resisted by the pressure of tlie-ratehet against the stop-bar 30. There is, therefore, no operative tension exerted upon the-pullstrap 20. When, however', the -universal arm 28 is moved to the rear, by its action through shaft 25, arm 27 and projection 2G to the universal bar 24, when a type-bar 23 is operated and moves the universal bar 27 by engagement therewith, its upper end 40 which is beveled engages the stop-bar 30and tilts the sameA slightly so as to release the ratchet 33. At the same time, the pin 41, which is carried by the bevel-arm 28, is interposed in front of the next approaching tooth oit' the ratchet, so that .when the universal-arm 28 is released the ratchet will have advanced one tooth. This permits the tension-shaft 14 to rotate and thus a pull is exerted upon the band 2O and the carriage moved to the left.

In order that the carriage mayl move uniformly the same distance each time the escapement mechanism operates, I have provided the retarding mechanism. 42 is a toothed-plate carried by the stop-bar 30. 43 is a dog` pivoted to the frame of the machine. 44 is a spring for holding it in the position shoWnAin Fig. 2. Then the stopar is in its normal position, the carriage cannot be moved to the left, except by the release of the stop-bar 30. This release is accomplished of course either manually by the handle 31 or'by the' universal mechanism. In the latter case, the universal-arm 28 allows the stop-bar 30 to descend and thus cause the tootl'ied-plate 42 to engage the pawl 43 and stop the carriage. The carriage may be moved to the right merely by manually releasing the stop-bar 30, or it may be moved to the right without releasing the stop-bar since I have provided a ratchet connection between the tension-shaft 14 and the bevel-gear 38. This consists of a springpawl 44 carried by the tensi, l ,-shaft and the duces the wear of the parts ot` the escapement mechanism in a longitudinal direction and consequently reduces the error of alinement which would be caused thereby.

'The advantages of this will be apparent to those skilled in the art.

that l claim is* 1. A typewriter carriage feeding mechanism, including a carriage construction. a tension device connected to the carriage, a universal bar, a pivoted stop bar provided with a `series of teeth, means cooperating with said stop bar for normally preventing said tension device from exerting a pull on said carriage, escapement means operated by said universal bar for permitting said tiension device to operate, and a sprix'ig-pressed pawl Afor overcoming the momentum of the.

carriage when said tension device is checked hy engaging the teeth on the stop bar.

2. A typewriter carriage feeding mechanism, including a carriage construction, a tension device connected to Ithe carriage, a

universal bar, a stop bar movably carried by said carriage, a ratchet cooperating with said stop bar, means of connection between said tension device and said ratchet, said carriage .normally being under no longitudinal tension, a member carried by the universal bar cooperating w-ith the stop b ar to form an cscapement for said ratchet, and means for operating said escapement mechanism for perniitting said tension device to move said carriage.

3. A typewriter carriage feeding mechanism, including a carriage construction, a tension device connected to the universal bar, a stop bar movably carried by the carriage, a ratchet cooperating with said stop bar,I means of connection between said tension device and said ratchet, said carriage normally being under. no longitudinal tension, a member carried by the universal bar cooperating with said stop bar to'form an escapement for said ratchet, means for opel'- ating said escapeinent mechanism for permitting said tension device to move said carriage, and means for checking the momentum ot' said carriage.

il. A typewriter carriage feeding mechanism, including a carriage tamstruetion, a tension device connected to the arriage, a universal bar, a stop bar carried by said carriage, a ratchet cooperating with said stop bar, a train of gears connecting said tension device and said ratchet, said tension device normally tending'to rotate said ratchet and the meuilier on said universal -bar cooperating with. thc stop bar to provide an escapeincnt mechanism tor releasing said ratchet troni said stop liar to permit said tension dcvice to rotate and move said tatrriage.

carriage, a

5. A typewriter carriage feeding mechatension device, means of connection between the tension device and the carriage, a stop bar carried by said carriage construction and a reducing train of gears, a ratchet connecting said train of gears with said tension device and stop bar, whereby the tension applied to said 'arriage, when said carriage is permitted to move, is greater than the pressure sustained by said stop bar.

-6. A typewriter carriage feeding mechanism, including a carriage construction, a tension device for moving said carriage, a universal bar, a stop bar carried by said carriage having a beveled member and also a series of teeth, a pivoted pawl adapted to engage said teeth for checking the momentum ofy said carriage, a member carried by the universal bar coacting with the beveled portion of said stop bar to provide an escapenient mechanism for permitting said carriage to move under the impulse of said tension device.

7. A typewriter carriage feeding mechanism, including a carriage construction, a stop bar carried thereby, a universal bar, a ratchet coacting with said stop bar, and a member carried by said universal bar to provide an escapement mechanism for permitting movement of said mechanism stepby-step, and a tension device for moving said carriage, said tension device consisting of a rotatable shaft, a drum carried thereby with a band connection to said carriage, a spring normally tending t0 rotate said shaft, and means including said escapement mechanism for preventing" the rotation of said shaft. I

8. A typewriter carriage feeding'mecha nism, including a carriage construction, a stop bar carried thereby, a ratchet coacting with said stop bar, a rotatable shaft, a train of gears connecting said shaft with said ratchet, a drum carried by said shaft, means for connecting said drum to l'said carriage for pulling said carriage, a relatively adjustable drum, and a spring having one end secured to said adjustable drum and theA other end secured to the shaft, for the purpose specified.

9. A typewriter carriage feeding mecha-v nism, including a carriage construction, a tension device, a universal bar, a movable stop bar carried by said carriage construction, a ratchet, means of connection between said tension device and said carriage, said withthe stop bar and with form an escapement mechanism for said tension device, sald universal bar provided With vin connection with said tension means for releasing said stop bar from said ratchet.

10. A typewriter carriage feeding mechanism, including a carriage construction, a tension device, a movable stop bar carried by said carriage construction, a ratchet coacting therewith, means of connection between said tension device and said ratchet, a universal bar provided with a member coacting with said ratchet, astop bar comprising part of an escapement mechanism for` said tension device and means for over-- coming the momentum of said carriage.

11. A typewriter carriage feeding mechanism, including a carriage construction, a stop bar carried thereby, a universal bar,- a tension device connected to said carriage, an escapement mechanism comprisinv a ratchet device and members carried by said stop bar and universal bar,.coacting with said ratchet, means controlled by said escapement mechanism for momentarily causing-said tension device to exert a pull on said carriage, and meansfor checking the momentum of said carriage.

12. A typewriter carriage feeding mecha- A nism, including a carriage construction, a tension device, a pivoted stop bar carried by said carriage and having a beveled surface, a ratchet coacting with said stop bar, means of connection between said tension device and said ratchet for causing the normal tension of said device to be applied to said stop bar, a band connection between said tension device and said carriage, and means. for momentarily releasing said ratchet from said stop bar to permit said tension device to apply a force to move said carriage longitu inally. l

13. Atypewriter carriage feeding mechanisin, including 'a carriage construction, a tension device, a ivoted stop bar carried by said carriage an having a beveled surface, a ratchet coacting with said Istop bar, means of connection between said tension device and said ratchet for causing the normal tension of said device vto be applied to said stop bar, a band connection between said tension device and said carrlage, means for momentarily 'releasing said ratchet from said stop bar to permit said tension device to apply a force to move said carriage longitudinally, and a spring-pressed pawl for checking -the momentum of sai'd carriage.

JESSE ALEXANDER. Witnesses:

RALPH C. POWELL, CnAs. A. Peano. 

